A pure substance is found to be a good conductor of electricity in both its solid and liquid

phases. The bonding in the substance is which one of the following?

(a) ionic

(b) covalent molecular

(c) metallic

(d) covalent network

Which of the following does not follow the kinetic molecular theory? Gas molecules have negligible volume. Gas molecules do not have mass. The average kinetic energy of gas molecules is proportional to the temperature of the gas molecules.

If 4 moles of gas are added to a container that already holds one mole of

Temperature (°C) Volume (cm) 2.4 5.8 21.5 5.8 39.6 6.7 55.6 6.9 71.2 7.4 A student collected the data shown above. Row may represent an error.

Wide shield-like mountains are formed from what type of lava?

What is the safest solution to protect yourself from chemical hazards in the work environment?

A system consists of two components, each of which must activate if the system is to activate. One component has a reliability of. 99. The other has a reliability of. 95. The components are independent of one another with respect to reliability.

Which of the following energy level changes for an electron is most energetic? 3 → 2 5 → 2 4 → 2

Is baking soda a element compound homogeneous mixture or heterogeneous mixture?

For the reaction: C (CH3) 3I + Cl - → C (CH3) 3Cl + I- What is the activation barrier for the SN2 reaction mechanism, in units of kcal/mol? Provide your answer to the nearest 0.1 kcal/mol.

Which of the following utilizes the measurement of a short - or long-lived radioactive element, with its decay product, to determine the absolute age of an object? A. varves B. radiometric dating C. dendrochronology